The document summarizes a study on the high-pressure phase transition of samarium bismuth (SmBi). The study used a modified three-body interaction potential model to investigate the phase transition pressure and associated volume collapse of SmBi. The model takes into account long-range Coulombic interactions, three-body interactions, van der Waals interactions, overlap repulsion, polarizability, and zero-point energy. The calculations predict a phase transition from the normal NaCl structure to a distorted CsCl structure at 17.8 GPa, with an 8.41% volume collapse. These values agree well with previous experimental measurements of 18.3 GPa transition pressure and 8.25% volume collapse. Thus, the